Steve ][ wrote:
> I like the idea of having a real glass break detector "do the work"
> and let the computer determine what to do next. I think matching
> waveforms might actually be harder than I first thought.

I agree.  You don't match the waveforms, but the frequency spectrum
and its envelope.  256-point FFT's only take a fraction of a second,
but that would keep you from sampling continuously, which is what is
needed to observe the sharp envelope.

Capturing the waveform would require an analog-to-digital converter
(ADC) card capable of sampling at least 20K samples per second.

-michael

NadaNet and AppleCrate II: parallel computing for Apple II computers!
Home page: http://home.comcast.net/~mjmahon

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